Improvement in instjlators tor lightning-rods



J. BURNHAM. INSULATOR POR- LIGHTNING RODS.

No. 93,410. Patented Aug. 10, 1869.

new state figment omen.

Letters Patent No. 93,410, dated August 10, 186p.

IMPRdVEMENT IN INSULATORS IOR LIGHTNING-RODS.

The Schedule referred to in these Letters Patent snd-making part of thesame.

To all whom it may concern Be it known that I, JOHN BURXHAM, of Batavia,

in the county of Kane, and State of Illinois, have invented certain newand useful Improvements in Insulators for Lightning-Rods; and I dohereby declare that the following is a full. clear. and exactdescription thereof, reference being had to the accomponymg drawings,and lettersmarked thereon, making a pan; of this description, in which-Figure 1 is a perspective representationof two insulatols, one beingfastened to a. roof, and the other to a vertical wall.

Figure 2, a peispective'view of one insulator detached from thebuilding.

Figure 3,-avertical section of the same. 4

The nature of the present invention consists in housing or covering theordinary glass insnlatorwith a case, which is provided with a piperunning through the glass,'by mean; of which. the rod is so protectedthat water will not till the space between the glass and rod, andthereby provide a conductor leading tiom the rod to the building, as isnow the case with the ordinary insulator.

B represents the roof, and A, the vertical wall of a building to whichthe insulator is fastened.

H represents an ordinary glass insulator, which is hold in place bymeans of a staple, J L, in the usual manner.

The housing or case for the insulator on the roof B is shown at G, andit consists of a piece of shoot-metal or other suitable material, whichis so formed as to extend about two-thirds around a circular end, F, towhich it is so fastened, bysoldcr or otherwise, as to form a water-tightjoint. 7

, This end F is provided with a pipe, I, which is somewhat larger thanthe rod G, which passes t-lnough it. and it is long enough to dischargewhat water enterstherein at a, point which is some littledistanw belowthe glass H, the pipe I being held-ii'om turning in the glass by redlead, or any other cement which is suitable for that purpose. p

The housing and pipe for theinsulator, attached to the vertical wall Aof the house, are constructed in the same manner as the bnedescribed,onlythat that part of the periphery D, projecting above the shank J ofthe staple, passes entirely around the end F, as shown at-fig. 3.

By means of this construction and arrangement, the insulator is made ascomplete during a min-storm as at any other time, for water cannot socollect on the rod, glass, and staple, as to form a connection with thebuilding,

Having thus described my invention,

\Vhat I claim, and desire to secure by Letters latent of the UnitedStates, is-.

The housings 1) 0, provided with pipes I, in combination with thestaples J L, glass H. and rod G, as and for the purpose set forth.

JOHN BURN HAM.

Witnesses:

J as. Nououn'r, E. E. GIBSON.

